Half-through crawling ladder platform structure

Abstract

The utility model relates to the technical field of bridge construction, in particular to a half-through crawling ladder platform structure which is used as an erecting base platform of a crawling ladder and comprises a structure body connected to a steel pipe buttress on the outer side of a pier. The structure body is composed of a horizontal frame body, a plurality of cable-stayed supports obliquely arranged at the top of the horizontal frame body and a plurality of bracket supports arranged at the bottom of the horizontal frame body, a ladder stand installation base is arranged on the horizontal frame body, the lower ends of the cable-stayed supports are connected with the top of the horizontal frame body, and the upper ends of the bracket supports are connected with the bottom of the horizontal frame body. The upper end of the cable-stayed support, the lower end of the corbel support and the side, close to the steel pipe buttress, of the horizontal support body are provided with plug pin bases, and the steel pipe buttress is provided with connecting lug plates corresponding to the plug pin bases. According to the utility model, the half-through crawling ladder platform structure connected to the steel pipe buttress on the outer side of the bridge pier is used as an erecting base station of the crawling ladder, so that the crawling ladder platform is not influenced by the limitation of a foundation, and the stability of the crawling ladder is improved, and the construction safety and efficiency are improved at the same time.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and more specifically, to a mid-span ladder platform structure. Background Technology

[0002] In the construction of bridge piers and superstructures in water, safety ladders are indispensable to ensure the safe passage of workers. However, when the passage connecting the main pier is constructed using an earth-rock cofferdam, and the foundation of the safety ladder is located on it, the ladder foundation is prone to settlement due to water erosion of the cofferdam foundation and rainfall erosion of the cofferdam surface, leading to instability and serious safety problems. Utility Model Content

[0003] The purpose of this utility model is to provide a mid-span climbing ladder platform structure, which is a mid-span climbing ladder platform structure connected to the outer steel pipe support of the bridge pier. This mid-span climbing ladder platform structure is used as the erection base of the climbing ladder to solve the problem of easy instability of the existing safety climbing ladder foundation located on the earth-rock cofferdam foundation, to ensure that the climbing ladder platform is not affected by the foundation limitation, and to improve construction safety and efficiency.

[0004] This utility model is achieved through the following technical solution: a mid-span climbing ladder platform structure, used as a base for erecting a climbing ladder, including a structural body connected to a steel pipe support pier on the outside of the bridge pier. The structural body consists of a horizontal frame, multiple inclined bracing supports set at the top of the horizontal frame, and multiple corbel supports set at the bottom of the horizontal frame. A climbing ladder mounting base is provided on the horizontal frame. The lower end of the inclined bracing supports is connected to the top of the horizontal frame, and the upper end of the corbel supports is connected to the bottom of the horizontal frame. Pin seats are provided at the upper end of the inclined bracing supports, the lower end of the corbel supports, and the side of the horizontal frame near the steel pipe support pier. A connecting lug corresponding to the pin seat is provided on the steel pipe support pier.

[0005] According to a preferred embodiment, the horizontal frame includes multiple longitudinal beams spaced parallel to each other along a first direction and multiple transverse beams spaced parallel to each other along a second direction. The transverse beams are connected to the longitudinal beams by bolts or welding. Scissor braces are provided between the multiple transverse beams. The second direction is perpendicular to the first direction. The pin seat is provided on one side of the longitudinal beam. The longitudinal beam is perpendicular to the height direction of the steel pipe support and is connected to a connecting lug on the steel pipe support through the pin seat.

[0006] According to a preferred embodiment, the crossbeams, longitudinal beams, and corbel supports are all I-beam structures, and the diagonal braces and scissor braces are all channel steel structures.

[0007] According to a preferred embodiment, the number of the inclined bracing, corbel brackets, and longitudinal beams is the same as the number of steel pipe supports. The lower end of the inclined bracing is connected to the end of the longitudinal beam away from the steel pipe support, and the upper end of the corbel bracket is connected to the middle of the longitudinal beam.

[0008] According to a preferred embodiment, the connecting lugs are arranged at intervals along the height direction of the steel pipe support.

[0009] According to a preferred embodiment, several of the connecting lugs are fixedly connected to the steel pipe support by high-strength bolts.

[0010] According to a preferred embodiment, the pin holder is provided with a spring pin.

[0011] According to a preferred embodiment, the surfaces of the pin seat, connecting ear plate, high-strength bolt and spring pin are all coated with an anti-corrosion coating.

[0012] The technical solution of the mid-span climbing ladder platform structure provided by this utility model has at least the following advantages and beneficial effects: (1) Using the mid-span climbing ladder platform structure connected to the steel pipe support on the outside of the bridge pier as the erection base of the climbing ladder can ensure that the climbing ladder platform is not affected by the limitations of the foundation, and improve the stability of the climbing ladder while improving construction safety and efficiency; (2) By pre-installing connecting ear plates on the steel pipe support, the climbing ladder platform can be connected to the ear plates by pins, which can realize the rapid installation and dismantling of the climbing ladder platform, further improving construction efficiency; (3) Using pins and ear plates to install the climbing ladder platform, compared with welding, ensures the stability of the connection while making the steel pipe support reusable, improving the reuse rate and reducing construction costs. Attached Figure Description

[0013] Figure 1 This is a top view of the mid-support climbing ladder platform structure provided in Embodiment 1 of this utility model;

[0014] Figure 2 This is a front view of the mid-support climbing ladder platform structure provided in Embodiment 1 of this utility model;

[0015] Figure 3 This is a side view of the mid-support climbing ladder platform structure provided in Embodiment 1 of this utility model;

[0016] Attached reference numerals: 100-steel pipe support, 200-structure body, 210-horizontal frame, 211-longitudinal beam, 212-crossbeam, 213-scissor brace, 220-diagonal brace, 230-bracket bracket, 240-ladder mounting base. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Example 1

[0019] See Figures 1 to 3 As shown, this embodiment provides a mid-span climbing ladder platform structure, which includes a structural body 200 connected to a steel pipe support 100 on the outside of the bridge pier. By using this mid-span climbing ladder platform structure connected to the steel pipe support 100 on the outside of the bridge pier as the erection base of the climbing ladder, compared with using an earth-rock cofferdam as the foundation, the erection scheme of this embodiment can ensure that the climbing ladder platform is not affected by the limitations of the foundation, thereby improving the stability of the climbing ladder while improving construction safety and efficiency.

[0020] The structural body 200 is composed of a horizontal frame 210, diagonal bracing 220, and corbel bracing 230. In this embodiment, multiple diagonal bracing 220 are obliquely arranged at the top of the horizontal frame 210 to transmit vertical loads and horizontal forces on the horizontal frame 210, provide tension to the horizontal frame 210, and transfer the vertical loads to the steel pipe support 100. Multiple corbel bracing 230 are arranged at the bottom of the horizontal frame 210, also to transmit vertical loads and horizontal forces on the horizontal frame 210, provide support to the horizontal frame 210, and transfer the vertical loads to the steel pipe support 100, thereby improving the structural strength of the platform structure.

[0021] The horizontal frame 210 is provided with a ladder mounting base 240, which is used to install and fix the top or bottom of the ladder. In this embodiment, the ladder mounting base 240 is a mounting bolt set on the horizontal frame 210, which is used to connect the top or bottom of the ladder to achieve the fixation of the corresponding parts. The ladder can be installed and fixed by mounting bolts on two adjacent platform structures.

[0022] Regarding the connection method between the platform structure and the steel pipe support 100, this embodiment adopts a pin-type connection. Specifically, in this embodiment, the upper end of the inclined support 220, the lower end of the bracket support 230, and the side of the horizontal frame 210 near the steel pipe support 100 are all equipped with pin seats, and the steel pipe support 100 is equipped with connecting ear plates corresponding to the pin seats. In this embodiment, by pre-installing connecting ear plates on the steel pipe support 100, the climbing platform is connected to the ear plates via pins, which enables rapid installation and dismantling of the climbing platform, further improving construction efficiency. In addition, compared with welding, using pins and ear plates for the installation of the climbing platform ensures connection stability while allowing the steel pipe support 100 to be reused, improving the reuse rate and reducing construction costs.

[0023] Example 2

[0024] This embodiment further explains the structure of the horizontal frame 210 based on embodiment 1:

[0025] In this embodiment, the horizontal frame 210 includes multiple longitudinal beams 211 arranged parallel to each other along a first direction and multiple transverse beams 212 arranged parallel to each other along a second direction, the second direction being perpendicular to the first direction. The transverse beams 212 are connected to the longitudinal beams 211 by bolts or welding to form the frame of the platform structure. Scissor braces 213 are provided between the multiple transverse beams 212 to enhance the stability of the platform structure. The pin seat is provided on one side of the longitudinal beam 211. The longitudinal beam 211 is perpendicular to the height direction of the steel pipe support 100 and is connected to the connecting lug on a steel pipe support 100 through the pin seat.

[0026] In a preferred embodiment of this invention, the crossbeam 212, longitudinal beam 211, and corbel bracket 230 are all I-beam structures of specification 16, providing effective support for the platform structure; the diagonal brace 220 and scissor brace 213 are all channel steel structures of specification 14, further enhancing the stability of the platform structure.

[0027] The number of the inclined bracing 220, the corbel bracket 230, and the longitudinal beam 211 is the same as the number of the steel pipe support 100. In this embodiment, two steel pipe supports 100 are used for the installation of the platform structure, so the number of the inclined bracing 220, the corbel bracket 230, and the longitudinal beam 211 are all 2. The lower end of the inclined bracing 220 is connected to the end of the longitudinal beam 211 away from the steel pipe support 100, and the upper end of the corbel bracket 230 is connected to the middle of the longitudinal beam 211 to optimize the stress distribution of the platform structure and reduce local stress concentration.

[0028] The following explains the structural verification of the platform structure:

[0029] In this embodiment, the structural verification considers the self-weight load of the ladder and the maximum load combination during use. The combined stress and shear stress results of the structural verification are as follows: the maximum combined stress value of the platform structure is 53.14 MPa, which is less than the standard requirement of 205 MPa, and the maximum shear stress of the platform structure is 17.77 MPa, which is less than the standard requirement of 120 MPa. Therefore, the strength of the platform structure can meet the standard requirements.

[0030] Furthermore, the maximum absolute displacement of beam 212 is 5.50 mm, which is less than the standard requirement of 8.85 mm, so the stiffness also meets the standard requirements. In addition, it has been verified that the buckling mode results of the platform structure are all greater than 4, so the stability of the platform structure meets the requirements, which will not be elaborated further here.

[0031] Example 3

[0032] This embodiment further illustrates the design of the steel pipe support 100 based on the technical solutions provided in any one of Embodiments 1 to 2:

[0033] In this embodiment, several connecting lugs are spaced apart along the height direction of the steel pipe support 100, which allows for the installation of multiple platform structures while also enabling the adjustment of the positions of each platform structure. Furthermore, several of the connecting lugs are fixedly connected to the steel pipe support 100 by high-strength bolts. Compared to welding the connecting lugs to the steel pipe support 100, bolt connection can extend the service life of the steel pipe support 100 and improve its reusability.

[0034] Example 4

[0035] This embodiment, based on the technical solution provided in Embodiment 3, further explains the pin-type connection between the platform structure and the steel pipe support 100:

[0036] In this embodiment, the pin seat is equipped with a spring pin or a quick-unlocking device. The spring pin or quick-unlocking device can achieve a stable connection between the platform structure and the steel pipe support 100, providing good stability while significantly shortening the installation and dismantling time of the platform structure and improving construction efficiency.

[0037] Furthermore, in this embodiment, the surfaces of the pin seat, connecting ear plate, high-strength bolt and spring pin are all coated with an anti-corrosion coating to further extend the service life of the platform structure.

[0038] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mid-span catwalk platform structure, characterized by, The utility model provides a set up base station for the trestle, including the structure body (200) connected on the outside steel pipe support pier (100) of bridge pier, the structure body (200) is by horizontal frame (210), the plurality of inclined pull support (220) of top inclined arrangement of horizontal frame (210) and the plurality of corbel support (230) of bottom setting of horizontal frame (210) constitute, the horizontal frame (210) is equipped with the trestle installation base (240), the lower end of inclined pull support (220) is connected with the top of horizontal frame (210), the upper end of corbel support (230) is connected with the bottom of horizontal frame (210), the upper end of inclined pull support (220), the lower end of corbel support (230) and the one side of horizontal frame (210) close to steel pipe support pier (100) are equipped with the bolt seat, the steel pipe support pier (100) is equipped with the connecting lug plate corresponding with bolt seat.

2. The mid-mounted cat ladder platform structure of claim 1, wherein, The horizontal frame (210) includes a plurality of longitudinal beams (211) arranged in parallel and spaced apart in a first direction and a plurality of cross beams (212) arranged in parallel and spaced apart in a second direction, the cross beams (212) are connected with the longitudinal beams (211) by bolts or welding, a plurality of the cross beams (212) are provided with scissors braces (213), the second direction is perpendicular to the first direction, one side of the longitudinal beams (211) is provided with the bolt seat, the longitudinal beams (211) are perpendicular to the height direction of the steel pipe support pier (100) and are connected with the connecting lug plate on one of the steel pipe support piers (100) through the bolt seat.

3. The mid-mounted cat ladder platform structure of claim 2, wherein, The cross beams (212), the longitudinal beams (211) and the corbel supports (230) are all I-beam structures, and the inclined pull supports (220) and the scissors braces (213) are all channel steel structures.

4. The mid-mounted cat ladder platform structure according to claim 3, wherein The number of the inclined pull supports (220), the corbel supports (230) and the longitudinal beams (211) is the same as the number of the steel pipe support piers (100), the lower end of the inclined pull support (220) is connected to one end of the longitudinal beam (211) away from the steel pipe support pier (100), and the upper end of the corbel support (230) is connected to the middle part of the longitudinal beam (211).

5. The mid-level catwalk platform structure of any one of claims 1 to 4, wherein, The connecting lug plates are arranged in a plurality of groups along the height direction of the steel pipe support pier (100).

6. The mid-mounted cat ladder platform structure according to claim 5, wherein The plurality of connecting lug plates are fixedly connected to the steel pipe support pier (100) by high-strength bolts.

7. The mid-mounted cat ladder platform structure according to claim 6, wherein The bolt seat is provided with a spring pin.

8. The mid-mounted cat ladder platform structure according to claim 7, wherein The surfaces of the bolt seat, the connecting lug plate, the high-strength bolt and the spring pin are coated with a corrosion-resistant coating.

Images